| ; RUN: llc -fast-isel=true -O1 -mtriple=x86_64-unknown-linux-gnu -start-before=codegenprepare -stop-after=codegenprepare -o - < %s | FileCheck %s | |
| ; CHECK-LABEL: @foo | |
| define void @foo() { | |
| top: | |
| ; CHECK: br label %L34 | |
| br label %L34 | |
| L34: ; preds = %L34, %L34, %top | |
| %.sroa.075.0 = phi i64 [ undef, %top ], [ undef, %L34 ], [ undef, %L34 ] | |
| %0 = icmp sgt i8 undef, -1 | |
| %cond5896 = icmp eq i8 0, 2 | |
| %cond58 = and i1 %cond5896, %0 | |
| ; During codegenprepare such degenerate branches can occur and should not | |
| ; lead to crashes. | |
| ; CHECK: br label %L34 | |
| br i1 %cond58, label %L34, label %L34 | |
| } |